Added property for SkipTeardownOnExit
Added property for SkipTeardownOnExit

Update issue 1445

Added property for SkipTeardownOnExit.

userzimmermann/robotframework-python3,userzimmermann/robotframework-python3,userzimmermann/robotframework-python3,userzimmermann/robotframework-python3,userzimmermann/robotframework-python3